Loom shuttle



0. V. PAYN E LOOM SHUTTLE Filed Aug. 9, 1954 2 Sheets-Sheet 1 my m w wwP e m m m w u n w 0. v. PAYN E LOOM SHUTTLE FiledAug. 9} 1934 2Sheets-Sheet 2 Knventor Oscar V. Pangne 1 M I @WV/Q 7 Attorneys PatentedJune 30, 1936 PATENT FFICE '-LooM SHUTTLE" Oscar V. Payne, Leicester,'Mass assignor to Crompton & Knowles Loom Works, Worcester, Mass,acorporation of Massachusetts v Application August 9, 1934, Serial No.739,083

,2 Claims. (01. 139 -209) This invention relates to loom shuttles and isa continuation in part of my prior application Serial No. 650,334, filedby me January 9,193.3, and

issued as Patent No. 1,977,083.

It is the general object of my invention to provide an improved shuttlefor use in a 100m having mechanism for indicating the condition of theweft supply in the running shuttle.

More specifically my invention-relates to. special features in a loomshuttle by which a pneumatic indication of the condition of weft supplymay be given without contact of the weft by any moving or mechanicalpart.

My invention further relates to, arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

Preferred forms ofthe invention are shown in the drawings, in which VFig. 1 is a plan View, partly in section, of a shuttle embodying myinvention, together with.

certain associated loom parts;

Fig. 2 is a sectional side elevation, taken along the line 2-2 in Fig.1;

Fig. 3 is an enlarged sectional elevation, taken along the line 3--3 inFig.2;

Fig. 4 is a sectional side elevation showing a second form of myinvention;

Fig.5 is a detail plan view, looking in the direction of the arrow 5 inFig. 4; I

Fig. 6 is an enlarged sectional elevation, taken along the line 66 inFig. 4;

Fig; 7 is a plan view showing a third form of my invention;

Fig. 8 is a sectional side elevation, taken along the line 8-8 inrFig.7, and

Fig. 9 is an enlarged sectional elevation, taken along the line 99 inFig. 8.

Referring to Figs. 1 to 3, I have shown a portion of a lay l having aback box plate I I, front binder l2 and picker l3 which provide a boxfor the shuttle S. The shuttle S is of a usual type and is shown asprovided with guides l4 and I through which the weft W is threaded.

The weft W is indicated as wound on a cop tube 2|l'having a slot 2disposed at one side thereof and near the base of the cop. A sleeve 22of thin rubber or other similar and suitable material is mounted on thecop tube and covers the slot 2|. 7

' The cop tube 20 is positioned in the shuttle S by placing the tube ona spindle 25 having ahead 26 (Fig. 2) resting on a block 21 andtransversely grooved to receive a pivotal projecting portion or rib 28on the block 21.

, municating with a transverse passage 42.

The upper face of the head 26 is formed with two oppositely inclinedfaces 29 and is engaged by a fiat spring 30 which is secured in a recessin the top of the shuttle by a screw 3|. The apex 32 of the spindle head25 is off-center with respect to the pivotal projection 28, so that thespring 30 holds the spindle firmly in horizontal position during loomoperation, as clearly indicatspindle 25 is swung partially upward andthe spring 30 engages one of the inclined faces 29 to -hold the'spindlein upwardly inclined position during the replacement of the exhaustedweft carrier. Y

The spindle 25 is provided with a recess 40, in itsbase' 26 and with anaxial passage 4| com- The transverse passage 42 communicates with aSegmental recess 43 in the surface of the spindle 25, 5 so that acontinuous air passage is formed through the recess 40, axial passage4|, transrubber ball 45, is mounted in a recess in the shuttle S belowthe spring 30 and is provided with an extension 46snugly fitting intherecess M! and having an axial passage 41 communicating with ,the passage4| in the spindle 25.

The shuttle S is also provided with an opening 48 in the side of theshuttle through which a yieldingly mounted plunger 5!] may enter andengage the ball 45 as the lay approaches front center. The plunger 55 ismounted on the loom frame 5| and is electrically connected to give anindication of weft exhaustion when the lay reaches front center, unlessthe plunger 50 is displaced forwardly by the rubberrball 45 so that thecontact screw 52 will not engage a contact plate 53 on the front face ofthe binder l2.

For the purposes of this application it is sufficient to state that ifthe ball resists deflation, the plunger 50 is moved forward with thelay, and the contact screw 52 is held out of engagement with a contactplate 53 on the front of the binder l2. If, on the other hand, the ball45 does not resist deflation, the parts remain in the position shown inFig. 1', with the screw 52 engaging the plate 53 and completing anelectrical circuit by which loom stoppage is eifected. A morecomstoppage of the loom.

will be found in my prior application above identified.

When the active shuttle S contains a weft carrier or cop tube having asuflicient supply of weft W thereon, the rubber sleeve 22 is heldtightly over the slot 2i and is held in close engagement with the coptube 29 at both ends of the slot 2|. Accordingly, the air in the ball 45is unable to escape rapidly when the ball is engaged by the plunger 50,and consequently the plunger 50 is moved forward, and thereby preventscontact .of V

the screw 52 with the plate 53.

hausted, as indicated in Fig. 1, there will remain only a few turns ofweft at the extreme bottom of the cop tube 2!] and overlying the bottomend ball is rapidly and partially deflated, either by escape of air fromthe free end of the sleeve 22 or by the outward expansion of the thinsleeve 22, as indicated in Fig. 1. In either event, sufiicient airescapes quickly from the ball 45 to permit the screw 52 to engage thecontact plate 53 and thereby complete the electrical circuit whichcauses .When the shuttle S is at the opposite side of the loom, asupplemental contact is opened in the electrical circuit, so thatengagement of the screw 52 with the plate 53 will not then com plete thecircuit and give an undesired indication.

My improved detecting mechanism is particularly desirable for use withsilk or other fine or delicate weft threads, as no mechanical elementengages the weft in the detecting operation, as has been customary inweft detectors previously in commercial use. The operation of thedetecting mechanism depends entirely on the retention or rapid escape ofair from the rubber ball 45, and such rapid escape of air is directlycontrolled by the presence or absence of the final layer of weftwindings about the middle and left-hand portions of the rubber sleeve 22(as Viewed in Figs. 1 and 2).

In Figs. 4, 5, and 6 I have shown the adaptation of my invention to'atype of spindle in which the spindle blade 60 is provided with aresilient portion 6| yieldingly engaging the inner surface of the coptube 20 and preventing axial displacement thereof.

The construction is substantially the same as that previously described,except that the air passage 62, transverse passage'63, and segmentalretially deflated to give an indication of weft exhaustion.

, In Figs. '7, 8, and 9 I have shown a third form of my invention inwhich the surface of the spin When the weft supply is substantially'ex-.

dle 10 is provided with a helical rib 'H in the portion adjacentthelateral air openings 12 which connectfwith the longitudinal air passage13.

With this construction the rib 1| holds the inner surface of the coptube 20 spaced from the spindle 10 sufficiently to allow air tocirculate entirely around-the spindle and it is thus unnecessary toprovide'the segmental recess in the body of the spindle as shown in theprevious forms.

' 'I have shown two lateral openings 12 but more or less openings may beused as seems advisable.

The use and operation of this form of my invention is identical withthose previously described. In the drawings'I have shown the spindle 10as a solid spindle; whereas in Fig. 1 the spindle 'is shown as providedwith a longitudinal slit'25 Both of these forms of spindles are old andwell known and for the purposes of my invention may be consideredinterchangeable.

Having thus described my invention and the advantages thereof I do notwish to be limited to the details herein disclosed, otherwise than asset forth in theclaims, but what I claim is:-

1. In 'a loom shuttle, a spindle having a head with a transverse groovein'one lateral face and an inclined face at the opposite side of saidhead, a block in said shuttle having a rib seated in said groove, and aspring positioned to engage said in-- clined face and hold said spindlein raised position. V

2. In a loom shuttle, a spindle having a head With a transverse groovein one lateral face and an inclined face at the opposite side'of saidhead,

tion, said spring also engaging said head when in lowered position at apoint offset toward the tip of the spindle from said transverse groove.

OSCAR V. PAYNE.

